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<div align="left"><b><u>Description<br>
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   A rigid spacecraft is subjected to gravity gradient torque while it revolves<br>
   around an eccentric orbit.<br>
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   <b><u>Inputs<br>
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      <b>Ixx, Iyy, Izz</b>                Principal moments of inertia (kg
 m2)<br>
       <b>e        </b>                      Eccentricity<br>
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 </small><b><u>Initial Condition</u></b><br>
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   <b>w1</b>, <b>w2, w3</b>:                  Spacecraft angular velocities 
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       <b>q1, q2, q3, q4</b>:             Quaternions<br>
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